Flanges

Flanges are used to connect the product Taco valves to PEX pipe connect the individual pipe sections together and for joining pipes to different hardware. GOST 12815-80 are 9 performances flanges with different shape and geometric dimensions of the docking surfaces. The most widely used flange 1-second performance. Flanges Other versions are used, usually with accessories operating at high pressures, with an aggressive work environment, etc. Depending on the method of welding the flanges to the pipeline, they are of two types – flat weld and weld butt (collar). Flat flanges must meet the requirements of GOST 12820-80 and can be applied in the temperature range from -70 to 450 ° C. Butt weld flanges (collar) should correspond to the requirements of GOST 12821-80 and can be used in the temperature range from -253 to 600 ° C. In the technical documentation and drawings for each type of flange has a certain designation, such as: Flange 1-50-6 GOST 12821-80 clause 20 where: 1 – response to the flange; 50 – conditional pass “Du”, 6 – Nominal pressure, PN; article 20 – the mark of steel, which is manufactured.